Use the Factory Reset function to reset certain machine settings back to the original factory settings.
HL-L2300D
HL-L2340DW/HL-L2360DN/HL-L2365DW
HL-L2300D
Press and hold
to turn off the machine. Make sure that the front cover is closed and the power cord is plugged in.
Hold down Go as you press
to turn on the machine. Keep Go pressed down until the Toner, Drum, and Paper LEDs light up. Press Go eight times. Make sure that all four LEDs light up, indicating that the machine has been reset to its factory default settings (except the Interface and Local Language settings).